Separating and recycling metal mixture of pyrolyzed waste printed circuit boards by a combined method

doi:10.1016/j.wasman.2020.04.006

IMR OpenIR

	Separating and recycling metal mixture of pyrolyzed waste printed circuit boards by a combined method
	Chen, Bin 1,2; He, Jie 1,2; Sun, Xiaojun 1,2; Zhao, Jiuzhou 1,2; Jiang, Hongxiang 1; Zhang, Lili 1
通讯作者	He, Jie(jiehe@imr.ac.cn)
	2020-04-15
发表期刊	WASTE MANAGEMENT
ISSN	0956-053X
卷号	107 页码:113-120
摘要	Waste printed circuit boards (WPCBs) contain a variety of valuable and hazardous materials. Recycling WPCBs is an important subject not only for environmental protection but also for sustainable development of resources. In this work, a new method combined low-temperature alkaline smelting with liquid-liquid phase separation is proposed to separate and recycle metal mixture in pyrolysis residue of WPCBs of mobile phones. During the low-temperature alkaline smelting process, amphoteric metals Al, Pb, Si, Sn, and Zn are firstly separated and recycled from the metal mixture with the separation rates of 99.5%, 81.6%, 97.8%, 88.4% and 95.7%, respectively. To separate the remaining metal mixture mainly containing elements Cu, Fe, Cr, Ni, Au and Ag, a liquid-liquid phase separation system is designed. As a result, the noble metals Au and Ag are concentrated in the copper-rich substance to form a high-value group, while the elements Ni and Cr distribute in the iron-rich substance. The iron-rich substance can be reused in the liquid -liquid phase separation process. In the super-gravity field, the recycling rates of the metals Au, Ag, Cr and Ni reach 98.1%, 99.8%, 95.6% and 75.4%, respectively. Furthermore, the iron-rich substance can be reused back to the liquid-liquid separation system. The copper-rich substance enriched by the noble metals can be efficiently recovered with low energy consumption and less pollution. This work provides an environmentally friendly and efficient route for separating and recycling the metal mixture in WPCBs. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Metal recycling Liquid-liquid phase separation Waste printed circuit boards Low-temperature alkaline smelting Noble metals
资助者	National Nature Science Foundation of China ; Alexander von Humboldt-Stiftung ; Natural Science Foundation of Liaoning Province of China ; key project of innovation foundation of IMR-CAS
DOI	10.1016/j.wasman.2020.04.006
收录类别	SCI
语种	英语
资助项目	National Nature Science Foundation of China[51974288] ; National Nature Science Foundation of China[51774264] ; National Nature Science Foundation of China[51574216] ; National Nature Science Foundation of China[51374194] ; National Nature Science Foundation of China[51901231] ; Alexander von Humboldt-Stiftung ; Natural Science Foundation of Liaoning Province of China[2019-MS-332] ; Natural Science Foundation of Liaoning Province of China[2019-BS-253] ; key project of innovation foundation of IMR-CAS[SCJJ-2013-ZD-03]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000536511400013
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138905
专题	中国科学院金属研究所
通讯作者	He, Jie
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Bin,He, Jie,Sun, Xiaojun,et al. Separating and recycling metal mixture of pyrolyzed waste printed circuit boards by a combined method[J]. WASTE MANAGEMENT,2020,107:113-120.
APA	Chen, Bin,He, Jie,Sun, Xiaojun,Zhao, Jiuzhou,Jiang, Hongxiang,&Zhang, Lili.(2020).Separating and recycling metal mixture of pyrolyzed waste printed circuit boards by a combined method.WASTE MANAGEMENT,107,113-120.
MLA	Chen, Bin,et al."Separating and recycling metal mixture of pyrolyzed waste printed circuit boards by a combined method".WASTE MANAGEMENT 107(2020):113-120.